# AddressBase Supply Set

This feature is formally known as the GML feature collection and is used to define a collection of features.

{% hint style="info" %}
This is not supplied as part of the CSV supply. Please see the model overviews in [AddressBase Plus structure](https://docs.os.uk/os-downloads/products/addresses-and-names-portfolio/addressbase-plus/addressbase-plus-technical-specification/addressbase-plus-structure) for more information.
{% endhint %}

## Feature type attributes <a href="#feature-type-attributes" id="feature-type-attributes"></a>

The following sub-sections provide details about the attributes included with this feature, their data types in the different output formats, and other important metadata about them.

### Query time

Time the data was extracted from the database.

* **Attribute Name**:  queryTime (GML), Not provided (CSV)
* **Data Type:** DateTime
* **Multiplicity**: \[1]

### Query change since date

{% hint style="info" %}
This attribute is only provided as part of a Change Only Update (COU) supply. It will not be provided if you take a Full Supply.
{% endhint %}

The date given as part of a change-only query.

* **Attribute Name**: queryChangeSinceDate (GML), Not provided (CSV)
* **Data Type:** Date
* **Multiplicity**: \[0..1]